Paint coming off of painted metal

I purchased some painted metal in 3 foot by 23 foot sheets in early summer of this year.To my surprise 7 weeks ago we was going to install it and the paint was bubbled up and some of the paint and primer had come off. What is this caused from.

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It could be from improper storage, depending upon the paint system. Have you contacted the manufacturer? There is a good chance that, if you repaint over the existing, the same thing will happen again.

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If it sat in a way that moisture collected and was trapped between or against panels, that could damage some paint systems, especially lower grade ones.

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